Apparatus for constructing hollow concrete columns.



110.340,6-38. PATBNTBD JAN. s, 1907.`

P, LOOHBR. APPARATUS FOR OONSTRUOTINO HOLLOW CONCRETE OOLUMNS.

APPL CATION FLED NOV.10. 1906.

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IIIIIIIIIIIIlllllllllllllllllllg 1m: HQRRIS PETERS co4. WASHINGTON, D.

` No. 840,638- PATENTED JAN. 8, 1907.

' n PLIJocHleR-A` APPARATUS PoR GONSTRUGTING HoLLoW QONGRETE APPLICATION FILED NOV. l0, 1906.

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.i FRITZ {LooHERQ oFAZnioH, swirZnnLAN/D, AssiGNoR 'ro THEFIRM or j Y i Loenen a c1E.,- or ZURioH,-sw1rZERLA-.Nn APPARATUS FOB CQNSTRUCTING HOLLOW CONCRETE COLUMNS.

Ta @ZZ whom `tft may' concern., y

.Be it known that I, Fnrrz LooHER, a citizen l' of the yRepublic ofSwitzerl-and, residing at Zrich, Switzerland, vhave invented certain new. and useful `Improvements in Apparatus f for y.Constructing YHollow Concrete v`Columns,

and I doherby declare-,the following: to be a i fullv clear,a`ndexact description ofthe inven-v tion, such as will enable others skilled inthe artA to, which it appertains to make and 'use the saine, reference being had to the accomfl panying drawings, land to letters of reference marked thereon, whichrform a part of this ,Speciatioe i l t My invention relates to the manufacture of hollow beton or concreteppillars orl columns,

, andhas for its subject apparatusforremoving the mold-cores, from the finished columns.

, b andhas anumber of lateral apertures c, avertica ack' d isarranged. i `The housing a and-the bare erectedin the. bricked it YF, of Jthefrarnework or scaffold T, ,which asv a' number of platforms or. st'agesE, to

which access can lbe had by means yof ,ladders orstepsgL.` The rackt is guidedso that it may reciprocate vertically in the framet, At thetop of the rack is a support e, -having a flat top or plate This support e ismounted on the rack and rotates about theaXiso-f the vertical `core `qof themold G, secured to the scaffold T by bars e for constructing hollow concrete columns. The core g rests upon the plate f and is secured tothe rack by means of ascrew-bolth.

represents `dowel-pins located inholes in they'plate f and entering corresponding recesses in the core. The latter consists of a plurality of superposed sections k, detachably connected together by means of bolts l.

m is a pinion which meshes with the rack d and is mounted on the shaft n, journaled in the frame b. At one end of theshaft there is loosely mounted a worm-wheel o, and .aV clutch-half p is likewise 4mounted on the shaft,

but only with cap ability of sliding in the longitudinal direction and not of rotating there- Specification of Letters Patent. Application led November 10, 1906. Serial No. 342,922.

Patented Jan. s, 1907.

on. The other clutchhalfp constitutes the boss of the worm-wheel o.y With the latter there engages a worm g, mounted. on a shaft r, thelocation of which is indicated by means of a broken line in the drawings. t A Y r can be rotated by'gears ss and shaft t. V At the iother end of the shaft n there is mounted a pulley u, which by means of a band or other power-transmitting member o isl connected with thepulley w, mounted f-on a vshaft prof vided with a crank-handle journaled in the casing a.

This shaft 'I y is a lever ful'crumed to oneof bearing'- l standards of the shaft n and havinga roller t, which engages in a groove inthe clutch-half p, whereby on throwing the` lever over the clutch can be thrown in ory out,

The operation orl the apparatusis as lfoll'owsz The top core-section is hungfupiona wire ropevD, which can bev drawn up, and

down by means of the winch W,lwhereupo'n the support ve is lowered by means ofthe winch t, which actuates 'the rack dfandcoperating parts.

1n this manner the core, ow.- I C.

ing to its being secured tothe supportl e ,by

the bolt h, will be vpartly drawn' out of'rthe column. Great force is required tofy thus draw out the core, 4since the concretejrnass adheres lto thelatter. For thisv reason the Vwinch' parts 04 g 8,8 are's'electedto give ahigh ratio,4 of transmission. Forjthe downward motionof the rack with` this transmission' gear lthe shaft t is rotatedin they direction 'of 'thel arrow in Fig.y 1, (for which purpose the' crank-handle a: must be transferred to` this shaft), The shaft transmits its rotary' motion, -by, meansof the parts sv s r gpo 7L, the clutch being in engagement, tothe pinion m,

wherebytheracl; is workedl downward. p The support e its sunk in'this way until `the bottom y.coresection v 7cv` is opposite'V the I apertures c', Fig.2. The core-sections are connected together, `as itlwere, in the manner ,of fa chain. This concatenation of core-sections v1c 1s efacted Byrne-bolts z being furnished. with head and tail pieces l l?, which runtrans -versely to the slots lc czland which bear against the transverse members of the coresections lc. lt will be seen from the drawings that when the parts are suspended as described the .core-sections k have in'so far changed their position relatively to each other that a space e is left between each two adjacent parts, whereby the parts 7c can be ing the head h2 in line withy the elongated slot' k3, which runs at right angles to the head h2. When now the support is still further lowered, the head h2 will pass through the slot 7f3, and the bottom or ultimate core-section now hangs freely suspended from the penultimate core-section. The ultimate core-section is next so turned that the tailpiece Z2 of the'bolt Z, which connects the two bottom core-sect1'. ons, can pass through the slot of the said ultimate or bottom core-section, whereby the latter can be detached from the next higher one and removed through one of the .apertures c from the housing a. The core is now lowered by means of the winch W through the distance of one core-section, so

tion which is at the level that the next core-section hangs opposite the apertures c, whereupon this section is ro tated, so that the tailpiece of the bolt which connects this section with the next higher Ione can pass through the slot k2 of the secof'the aperture c,

vwhereby this section also can be detached from the remaining sections, and so on until all the sections of the core have been removed from the column through the apertures c of the housing a'. If only small power is necessary to move the support e-e. g., when the support is to be elevated-the shaft n can, if the clutch has been thrown out, be

rotated by the parts u n w with small ratio of transmission. In order to prevent the concrete mass from adhering to the core during the process .of making the column, the core must be turned from time to time. F or this purpose the support is rotated, this rotary motion bein@ then transmitted to the core by means of the dowel-pins i.

Having now particularly described and as` certained 'the `nature of the said invention and in what manner the same is to be performed, I declare that whatI claim is- I yl. In apparatus for making hollow concretelcolumns, in combination, a core consisting of a concatenation of detachable sections; a .support for the bottom section means for moving the support in vertical directiongvand means for detachably securing the coreto the saidl support, substantially as described. l

2. In apparatus for making hollow consaoss crete columns, in combination, a core consisting of a concatenation of detachable sections g a support for the core 5 a rack. carrying l the support 5 a shaft g a pinion mounted thereon meshing with the rack, and a winch for rotating the shaft g substantially as described.

3. In apparatus for making hollow concrete columns, in combination, a core consisting of a concatenation of detachable sections; a support for the core; a rack, recessed at the top, carrying the support; a shaft, a pinion mounted thereon meshing with the rack; a winch for rotating the shaft; a crosspiece, having an elongated slot, located at the bottom of the lowest core-section; a screw-bolt passing through the slot and the rack-recess and securing the core to the support and dowel-pins on the support entering recesses in the bottom of the core; substantially as described.

4. In apparatus for making hollow con-\ crete columns, in combination, a core consisting' of a concatenation of detachable sections, each having dowel-pins at one end and corresponding recesses at the other end;

cross-pieces, having an elongated slot, at the 1 bottom of the core-sections; cross-pieces having an elongated slot running at right angles to the slot in the said cross-pieces, located at the top of the core-sections; and bolts passing through the two slots in each two adj acent cross-pieces and presenting an elongated head and a like tailpiece disposed at a right angle to the head g substantially as described.

5. In apparatus for making hollow concrete columns, in combination, a core consisting of a concatenation of detachable' sections; a support located below.` the core a rack carrying the support; a pinion meshing with the rack; a shaft carrying the pinion; a

winch, and gearing. having respectively high and low ratios of transmission for driving the shaft; substantially as described.

6. In apparatus for making hollow concrete columns, in combination, a core consisting of a concatenation of detachable sections a support for the bottom core-section; and means forr operating the support in vertical direction and means for rotating the support; substantially as described.

In testimony `that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

FRITZ LOCHER.

Witnesses:

En Loonnn, A. LIEBERKNECHT.

LOD 

